Lydia Perez owns a bookshop in Acapulco, Mexico, and is married to a fearless journalist. Luca, their eight-year-old son, completes the picture. But it only takes a bullet to rip them apart.

In a city in the grip of a drug cartel, friends become enemies overnight, and Lydia has no choice but to flee with Luca at her side. North for the border... whatever it takes to stay alive. The journey is dangerous - not only for them, but for those they encounter along the way. Who can be trusted? And what sacrifices is Lydia prepared to make.